[ovs-discuss] QoS

[Aravind Ganesan]

Ben
Thanks for your reply.
I am just worried about the case when the link is congested. if possible,
can you please describe how to do it in the controller

Thanks


On Sat, May 14, 2016 at 1:58 PM, Ben Pfaff <blp at ovn.org> wrote:

> You could use a controller.
>
> You are probably wasting your effort, though, because the QoS in use
> probably does not do anything if the link is not congested.
>
> On Sat, May 14, 2016 at 12:22:21PM -0700, Aravind Ganesan wrote:
> > Ben,
> > Thanks for your reply.
> > So is there a possible indirect method to achieve it?
> > In my case too the QoS need not do anything when there is no congestion,
> > but I want to invoke them when there is congestion. I am able to get the
> > network statistics, but am unable to proceed after that.
> > It would be helpful if you could suggest something.
> >
> > Thanks
> >
> > On Sat, May 14, 2016 at 11:51 AM, Ben Pfaff <blp at ovn.org> wrote:
> >
> > > On Fri, May 13, 2016 at 11:19:19PM -0700, Aravind Ganesan wrote:
> > > > I have created QoS classes, and am able to separate the traffic
> based on
> > > > source address.
> > > > What I want to do now is enable QoS classes only when link is
> congested.
> > > > For example, if there are 3 hosts, h1, h2, h3, connected by single
> switch
> > > > s1.  Suppose h1 is sending file to h3. Simultaneously h2 wants to
> send
> > > file
> > > > to h3. I measure the bandwidth of s1->h3. If it is less than say 100
> > > Mbps,
> > > > I invoke QoS class and give priority to packets from h2.
> > > > Is it possible to do this?
> > >
> > > OVS can't do that directly, but there's not much value in it anyway
> > > because most QoS strategies don't do anything if the link is not
> > > congested.
> > >
>
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